/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: LENOVO
 * Date: 2024-08-07
 * Time: 23:38
 */
public interface IOperations {
    void display();

    int size();

    boolean contains(int key);

    void addFirst(int val);

    void addLast(int val);

    void addIndex(int index,int val);

    void remove(int key);

    void removeAllKey(int key);

    void clear();
}